1906.] TURBELLARIA OF THE CAPE VERDE ISLANDS. 707 



Dredged 1 fathom, Boa Yista. (15.) 



This specimen is 25 mm. long and 18 mm. broad ; much smaller 

 than the Mediterranean specimen described by Lang, which had a 

 length of 65 mm. and a breadth of 40 mm. Except for the 

 difference in size, however, I can find no character which will serve 

 to distinguish Mr, Crossland's specimen from the type. 



Two smaller specimens found at St. Yincent at low tide (17) are 

 to be referred here. They are about 5-6 mm. long and, unlike 

 the Boa Vista specimen, quite immature sexually. 



STYLOCHIDiE. 



Stylochus neapolitanus (Delle Chiaje) ? 



Stylochus neapolitanus Lang [1884] pp. 447-449, Taf. i. fig. 7. 



(9.) " Fi'om the bottoms of lighters ; in crevices of compound 

 ascidians ; or in empty lamelhbranch shells. Large and thick, and 

 though soft, stiff when alive. The specimens differed in colour. 

 Of two (dated 30-7-04) the larger is uniformly of a dull brown, 

 under a lens appearing as dull pink with small grey spots ; the 

 smaller specimen is brighter, light orange with large grey spots. 

 Of three specimens found together (dated 17-8-04) one is bright 

 orange in colour, the others brown. In all cases the tentacles are 

 dark grey and the ventral surface white." 



The largest specimen is about 35 mm. long. 



I have some doubts as to whether this species is really identical 

 with the Mediterranean S. neapolitanus. The species of this 

 genus are difficult to diagnose in a satisfactory manner, and their 

 structure does not vary in such a way as to facilitate the 

 description and ready recognition of species. Consequently I 

 think it best to record these Cape Yerde Is. specimens under this 

 name. They certainly resemble the typical S. neapolitanus very 

 closely and are nearly related to it. 



Leptoplanid^. 



Sttlochoplana (?) SARGASSICOLA von Graff. 



Stylochoplana sargassicola v. Graff [1892] pp. 207-213, Taf. ix. 

 figs. 1-5. 



" Two specimens, Boa Vista. Dredged in 1 fathom of water." 

 (15. W. 4.) 



A widely distributed species, dift'ering to a considerable extent 

 from other forms referred to this genus. 



Leptoplana alcikoi Schmidt. 



Lep)topla7ia alcinoi Lang [1884 pp. 486-489, Taf. iii. figs. 2-5 



Several specimens which appear to belong to this species " from 



amongst nodules of nullipore dredged in from 5-10 fathoms," 



with Oligocladus sanguinolenttcs. (2. W. 2.) 



