Male 0/ Dcxamine tliea^ BoecJc. 119 



under the headin^jf of *' Tntoita doUchonyx, Nebeski," he 

 states : " I have little doubt that this is the adult male of 

 T. gibhosa (Bate). Only the males appear to have the 

 ciiaracteristic excavation in the anterior edge of the hand of 

 the second gnathopods, and both Mr. D. Robertson and 

 myself have taken them associated with T. fjibbosa.'' Again, 

 he observes in referring to Tritceta gibbosu (Bate) (16) : "It is 

 remarkable that the emargination of the propodos of the first 

 gnathopod in the adult males of this species, which caused 

 Nebeski to make a distinct species of it (T. dolichonyx) — the 

 italics are mine, — should have escaped the notice of so many 

 carcinologists, including even so careful and accurate an 

 observer as Professor G. O. Sars." Sars, in describing 

 D. thea in the first part of his great work (9), makes no 

 reference to the male sex ; but in his Supplement (15), where 

 he describes the male of T. gibbosa (Bate), he evidently 

 accepts Walker's view, for he observes: "According to 

 Mr. Walker, this j)cculiar sexual character has given rise 

 to the establisliment of a spurious species, viz. 7'. dolichonyx 

 (Nebeski), which is nothing but the male of T. giUiosa." 



Both Nebeski and Chevreux have made a rather curious 

 mistake in observation in ascribing the peculiar formation 

 of the hand to the second gnathopods, whereas it really 

 occurs in the first. Nebeski (4) says " das breite Handglied 

 des zioeiten Gnathopodenpaares beim Mannchen am Ober- 

 rande tief ausgebuchtet/' Chevreux (6), in recording 

 Z). dolichony,v,'Neh., from the coast of France, observes: "Le 

 male se reconnait immediatement a Techancrure si carac- 

 teristique du bord antcrieur de la main des pattes de la 

 seconde paire" ; and again (7) he says : " Cette forme a peut- 

 etre ete quelquefois confondue avec D. thea, Boeck, dont 

 elle se rap[>roclie par Tabsence d'une dent an premier article 

 des autenncs su|)eiieures. Les males relativement peu 

 nombreux se distiiiguent au premier coup d'oeil de ceux de 

 I'espece voisine par I'echancrure si caracteristique du bord 

 anterieur de la main du deuxihne gnathopod, echancrure qui 

 n'existe jjas chcz les femelles. L'espece est bien nettement 

 caracterisee pas les dentelures qui bordent les opimcres des 

 quatrc premieres paircs." 



Walkci* has made a similar mistake in observation (13),, 

 but subsequently (16) he rightly ascribes the peculiar 

 formation oP the hand to the liist gnathopods. 



Kolicrtson (14) drew attention to Ncbeski's error in this 

 connection, but, curiously enough, he also regarded Ncbeski's 

 sj)ccies as identical with the male of T. gihhosa (Bate). He 

 remarks : " The (^l\ de spreiiuciis oF T. r/ibbosa agree with. 



