196 SCIENTIFIC RESULTS OF THE 
one for the penis, which is armed with a stylus; another for a hasta 
amatoria, through which opens a peculiar gland (quite as in the genus 
Asteronotus) ;! a third for the vagina, and the fourth for the duct of 
the mucous gland. 
Only one species of the genus seems hitherto known, belonging to 
the northern part of the Atlantic Ocean. The spawn of the species 
is known from Alder and Hancock, but nothing else is known of the 
biology of the animal. 
1. J. Johnstoni (A. et H.). 
Doris Johnstoni, A. et H. Oceanum Atlantic. septentr. 
Jorunna Johnstoni (A.et H.). Plate VIII, fig. 19; Plate IX, fig. 1-11. 
Doris Johnstoni, Alder et Hance. Monogr. Part I, 1845, fam. 1, P1.5; Part 
We, i8ad. dam. Pl, f. 6-04. 
Doris Johnstoni, Hanc. et Embleton, Anat. of Doris. Philos. Trans. 1852, 
MM. 2127210; 216 220 pcos. el we te LO eleanor LOn 
Pl. XV, f. 1-2; pl. XVII, f. 2-3. 
Doris Johnstoni, Forbes and Hanley, Hist. of Br. Moll., III, 1853, p. 564. 
? Doris tomentosa, Cuv., Fischer. Journ. de Conchyl., 3me Sér., x, 1870, 
p. 290-293 ; XV, 1875, p. 211, note. 
? Doris tomentosa, C. Verany, catalogo. 1846, p. 16-21. Ver., Hane. et 
Embleton, 1. c. 1852, p. 220.? 
? Doris tomentosa, C. Philippi, En. Moll. Sic. I., 183, p. 104; II, 1844, p. 
79, Tab. XIX, f. 9. 
Color flavescens, dorso interdum maculis fuscis seriatis ornatus ; 
rhinophoria fusco-maculata ; branchia albescens. 
4, . 
Hab. Oceanum Atlanticum septentr. 
This species, that was first described by Johnston under the name 
of D. obvelata (Muller), was (1845) established by Alder and Han- 
cock. Hancock gave a series of anatomical remarks upon this very 
interesting form and of figures referable to it. Since then nothing 
new seems to have been published about the species ; but a few months 
ago I (J. c¢.) gave a short notice of the generic characters of the 
group. 
Of this form I have only examined a single specimen, captured in 
March, 1870, in the neighborhood of Hellebik, on the north coast of 
Seeland (Denmark). 
1 R. Bergh, Ueber das Geschlecht Asteronotus, Ehrbg. Jahrb, der Deut- 
schen Malakozool. Ges., iv, 1877, p. 161-1738, Taf. I-II. 
2 According to Hancock and Embleton (1. ¢., p. 220), the dart (hasta 
amatoria) in Dorts Johnstoni is straight, in D. tomentosa, Ver., curved. 
