NANNOLENIDA. 105 
These facts, taken in conjunction with somewhat similar gradational variation in 
the structure of the copulatory apparatus exemplified by Spirostreptus, Iulomorpha 
(chilensis), and Pseudonannolene, make it hardly possible to maintain the Cambaloidea 
as a group equivalent to the Spirostreptoidea. In this monograph, therefore, I have 
merely given family rank to the Central-American Cambaloid genus Hpinannolene. 
Since it is highly possible that some, perhaps all, of the American Spirostreptoid 
genera referred by Cook to the Cambaloidea (Ann. N. York Acad. Sci. ix. p. 6, 1895) 
will be discovered in Central America, I subjoin a key for their identification—using, 
without prejudice, the family names that have been proposed by my predecessors. 
The gnathochilarium has been taken as a basis for the classification, because it enables 
the females as well as the males to be distinguished :— 
a. Lingual lobes of gnathochilarium large, quadrate, and in contact 
throughout their length in the middle line as in the Spirostreptide ; 
anterior legs of male with only one free clawless segment; copula~ 
tory apparatus as in Nannolenide and Pseudonannolenide . . . PHysiostTREPTIDE 
(PHYSIOSTREPTUS). 
a’. Lingual lobes of gnathochilarium narrowed posteriorly and separated 
throughout their length by a forward prolongation of the pro- 
mentum, which is separated by a joint from the posterior portion 
of the plate. 
6. Anterior prolongation of the promentum narrow and entire. 
c. Segments of the body strongly carinate; eyes in a single series ; 
copulatory apparatus with flagellum . . . . . «+ . . CaAmBaLip# (CaMBALA). 
". Segments without trace of keels; eyes multiserial . . . . NANNOLENIDA. 
- Copulatory apparatus with flagellum (? with distinct coleopods 
and phallopods) ; legs of first pair 4—5-jointed and clawless ; 
no pores on the fifth segment . . . . . . . . ». . IvLomorpHa. 
da’, Copulatory apparatus consisting of a pair of biramous sclerites 
without flagellum. (? NaNNOLENE.) 
e. No pores on the fifth segment; anterior leg of male clawless. NanNoLene. 
e'. Pores present on the fifth segment; anterior leg of male 
withaclaw. . . . Lo . EPINANNOLENE. 
6‘. Anterior prolongation of the promentinm wide and longitudinally 
bipartite ; copulatory apparatus as in Hpinannolene, and pores upon 
the fifth segment . . Loe ee ee ew ee ee +) )©6PSEUDONANNOLENIDE. 
Of the Physiostreptide only one genus, Physiostreptus, containing one species, 
P. ortonede from Guayaquil, has been recorded. The Cambalide also, as above 
defined, has but one genus, Cambala, and one species, C. annulata, Say, which has been 
recorded from various Eastern States of North America (see Bollman, Ann. N.Y. Acad. 
iv. p. 41, 1887). Lulomorpha, based upon the South-African species I. kinbergi, Porat 
(Ofv. Vet.-Akad. Forh. 1872, no. 5, p. 15), has been identified by Silvestri as also 
BIOL. CENTR.-AMER., Diplop., October 1909. P 
